Question

67×9+99×3，请用三种简便方法计算。

谢谢！

Answer 1

1.排竖式
2.用计算器
3.用手机
4.用电脑
这个四个方法，相信都是简便的

Answer 2

67×9+99×3
=67×9+33×9
=（67+33）×9
=100×9
=900
67×9+99×3
=67×3×3+99×3
=（201+99）×3
=300×3
=900
67×9+99×3
=67×（10-1）+3×（100-1）
=670-67+300-3
=970-70
=900

Answer 3

1）67(10-1)+33(10-1)
=670+330-(67+33)
=1000-100
=900
2）9(67+33)
=9*100
=900
3）67×9+99×3
=67×3×3+99×3
=（201+99）×3
=300×3
=900

Answer 4

(1)67(10-1)+(100-1)*3
=670-67+300-3
=970-70
=900
(2)9(67+33)
=9*100
=900
(3)67(10-1)+33(10-1)
=670+330-(67+33)
=1000-100
=900

Answer 5

+222222222